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Calcium aluminate cement-corundum castable taking water-soluble calcium chloride as additive and method thereof

A calcium aluminate cement and castable technology, applied in the field of refractory materials, can solve problems such as no retrieval, and achieve the effects of avoiding voids and cracks, buffering thermal stress, and increasing the uniformity of contact area and distribution.

Active Publication Date: 2012-10-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] None of the above patent publications and documents relate to the use of water-soluble CaCl 2 As an additive to calcium aluminate cement combined with corundum castables, there is no search for any information on the use of water-soluble CaCl 2 Known technology in combination of calcium aluminate cement as additive and corundum castable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The distribution ratio of each component is (mass percentage): 70% of platy corundum aggregate, 19.5% of platy corundum fine powder, 5% of activated alumina micropowder, 5% of calcium aluminate cement, 0.5% of water reducing agent, and the mass of the above-mentioned raw materials Sum of 0.5% water soluble CaCl 2 (with additives);

[0033] a. Mix the platy corundum aggregate and fine powder, activated alumina micropowder, calcium aluminate cement and water reducer according to the proportion in the formula, and pre-mix the raw materials for later use;

[0034] b. Add CaCl 2 Dissolve in water, stir until the solution is clear and transparent, let it stand, cool naturally to room temperature, and set aside; the amount of water used is CaCl 2 8 times;

[0035] c. Pour the material obtained in step a into the JJ-5 cement mortar mixer, and after dry mixing for 1 minute, add the CaCl obtained in step b first. 2 Aqueous solution, wet mix for 3 minutes, then continue to ad...

Embodiment 2

[0039] The distribution ratio of each component is (mass percentage): 70% of platy corundum aggregate, 19.5% of platy corundum fine powder, 5% of activated alumina micropowder, 5% of calcium aluminate cement, 0.5% of water reducing agent, and the mass of the above-mentioned raw materials Sum of 1.0% water soluble CaCl 2 (with additives);

[0040] a. Mix the platy corundum aggregate and fine powder, activated alumina micropowder, calcium aluminate cement and water reducer according to the proportion in the formula, and pre-mix the raw materials for later use;

[0041] b. Add CaCl 2 Dissolve in water, stir until the solution is clear and transparent, let it stand, cool naturally to room temperature, and set aside; the amount of water used is CaCl 2 4 times;

[0042] c. Pour the material obtained in step a into the JJ-5 cement mortar mixer, and after dry mixing for 1 minute, add the CaCl obtained in step b first. 2 Aqueous solution, wet mix for 3 minutes, then continue to ad...

Embodiment 3

[0046] The distribution ratio of each component is (mass percentage): 70% of platy corundum aggregate, 19.5% of platy corundum fine powder, 5% of activated alumina micropowder, 5% of calcium aluminate cement, 0.5% of water reducing agent, and the mass of the above-mentioned raw materials The sum of 1.5% water-soluble CaCl 2 (with additives);

[0047] a. Mix the platy corundum aggregate and fine powder, activated alumina micropowder, calcium aluminate cement and water reducer according to the proportion in the formula, and pre-mix the raw materials for later use;

[0048] b. Add CaCl 2 Dissolve in water, stir until the solution is clear and transparent, let it stand, cool naturally to room temperature, and set aside; the amount of water used is CaCl 2 2.5 times;

[0049] c. Pour the material obtained in step a into the JJ-5 cement mortar mixer, and after dry mixing for 1 minute, add the CaCl obtained in step b first. 2 Aqueous solution, wet mix for 3 minutes, then continue...

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Abstract

The invention discloses a calcium aluminate cement-corundum castable taking water-soluble calcium chloride as an additive and a preparation method thereof. In the method, a calcium aluminate cement-corundum castable is prepared by taking pure calcium aluminate cement as a bonding agent, adding water-soluble additives CaCl2 of different proportions and adopting an appropriate mixing process based on a common corundum castable. Due to the adoption of the calcium aluminate cement-corundum castable, the problem of difficulty in dispersing solid nanometer additive particles into a castable system is solved; and an added water-soluble precursor is uniformly distributed onto the surfaces of castable aggregate and fine powder in the form of ions, so that the contact area and distribution uniformity among an additive, the aggregate and the fine powder are greatly increased. A large amount of high-dispersity CA6 is generated in situ after the corundum castable prepared with the method is calcined at 1,450 DEG C, and a large quantity of fine gaps or cracks which are uniformly distributed are formed in a substance since flaky CA6 is only about 100 nanometers in thickness, so that the thermal shock resistance of the castable is improved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a water-soluble calcium chloride CaCl 2 Calcium aluminate cement bonded corundum castable as additive and method thereof. Background technique [0002] As a kind of amorphous refractory material, corundum castable has excellent high temperature performance, high strength, good volume stability, corrosion resistance, impact resistance, strong structural integrity, convenient construction and maintenance, and is widely used in metallurgy, building materials, petrochemical industry, etc. industry is widely used. Calcium aluminate cement is often used as a binder in corundum castables. During the use of the corundum castable combined with calcium aluminate cement, when the temperature rises to a certain level, the hydration product of calcium aluminate cement will dehydrate and combine with the Al in the matrix. 2 o 3 In situ reaction of fine powder to generate cal...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 朱玲玲叶国田王青峰周颖陈留刚翟鹏涛
Owner ZHENGZHOU UNIV
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